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FNCA52 TJSJ 211930
FWFSJU
FIRE WEATHER PLANNING FORECAST FOR PUERTO RICO
NATIONAL WEATHER SERVICE SAN JUAN PR
330 PM AST WED OCT 21 2026
DISCUSSION
NO FIRE DANGER IS EXPECTED TODAY.
PRZ014-220800-
SOUTHEAST COASTAL PLAINS-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 60 50 70
TEMP (24H TREND) 74 (-2) 90 (0) 74 90
RH % (24H TREND) 94 (+8) 54 (-3) 92 54
WIND 20FT/EARLY(MPH) E 5 E 12 E 5 E 11
WIND 20FT/LATE(MPH) E 5 SE 13 E 8 SE 12
MIXING HGT(FT-AGL/MSL) 3880 4300
TRANSPORT WND (MPH) E 12 SE 14
VENT RATE (KT-FT) 38800 51600
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ015-220800-
SOUTHERN HILLS-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 10 70 40 70
TEMP (24H TREND) 70 (-3) 88 (+3) 71 88
RH % (24H TREND) 98 (+7) 64 (-1) 98 64
WIND 20FT/EARLY(MPH) E 6 E 10 E 6 E 10
WIND 20FT/LATE(MPH) E 5 SE 10 E 6 SE 10
MIXING HGT(FT-AGL/MSL) 4010 4470
TRANSPORT WND (MPH) SE 9 SE 14
VENT RATE (KT-FT) 32080 53640
DISPERSION 5 5
DSI 2 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ016-220800-
NORTH COASTAL PLAINS-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 80 40 100
TEMP (24H TREND) 72 (-3) 91 (+1) 73 91
RH % (24H TREND) 98 (+5) 61 (-2) 99 62
WIND 20FT/EARLY(MPH) SE 10 SE 11 SE 11 SE 10
WIND 20FT/LATE(MPH) SE 5 E 12 SE 8 E 12
MIXING HGT(FT-AGL/MSL) 4120 4470
TRANSPORT WND (MPH) E 7 SE 9
VENT RATE (KT-FT) 24720 35760
DISPERSION 5 5
DSI 2 5 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ017-220800-
NORTHERN HILLS-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 100 30 100
TEMP (24H TREND) 70 (-2) 90 (+2) 71 90
RH % (24H TREND) 99 (+4) 64 (+2) 99 63
WIND 20FT/EARLY(MPH) SE 9 SE 8 SE 10 SE 6
WIND 20FT/LATE(MPH) SE 5 E 8 SE 6 E 10
MIXING HGT(FT-AGL/MSL) 3130 3650
TRANSPORT WND (MPH) E 5 SE 8
VENT RATE (KT-FT) 12520 25550
DISPERSION 5 5
DSI 2 5 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ018-220800-
WEST COAST-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 10 70 40 40
TEMP (24H TREND) 72 (-2) 91 (0) 73 92
RH % (24H TREND) 96 (+4) 63 (0) 96 63
WIND 20FT/EARLY(MPH) E 12 SE 11 SE 13 E 11
WIND 20FT/LATE(MPH) E 9 SE 13 E 11 SE 12
MIXING HGT(FT-AGL/MSL) 2450 2340
TRANSPORT WND (MPH) E 8 SE 13
VENT RATE (KT-FT) 17150 25740
DISPERSION 5 5
DSI 3 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ019-220800-
EASTERN INTERIOR-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 20 70 60 100
TEMP (24H TREND) 71 (-3) 89 (+1) 72 89
RH % (24H TREND) 98 (+6) 62 (0) 98 62
WIND 20FT/EARLY(MPH) SE 8 SE 11 SE 8 SE 10
WIND 20FT/LATE(MPH) SE 6 SE 11 SE 6 SE 11
MIXING HGT(FT-AGL/MSL) 4850 5260
TRANSPORT WND (MPH) SE 10 SE 14
VENT RATE (KT-FT) 43650 63120
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ022-220800-
LUQUILLO MOUNTAIN RANGE-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY MCLDY CLOUDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 60 60 90
TEMP (24H TREND) 70 (-3) 87 (+4) 70 87
RH % (24H TREND) 100 (+5) 64 (-4) 100 65
WIND 20FT/EARLY(MPH) SE 6 SE 10 SE 6 SE 9
WIND 20FT/LATE(MPH) SE 5 SE 10 SE 5 SE 10
MIXING HGT(FT-AGL/MSL) 4110 3880
TRANSPORT WND (MPH) SE 12 SE 14
VENT RATE (KT-FT) 41100 46560
DISPERSION 5 5
DSI 2 6 2 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ023-220800-
CENTRAL MOUNTAIN RANGE-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER MCLEAR PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 80 30 80
TEMP (24H TREND) 68 (-3) 86 (+3) 68 86
RH % (24H TREND) 99 (+5) 67 (0) 99 67
WIND 20FT/EARLY(MPH) SE 9 SE 8 SE 10 SE 9
WIND 20FT/LATE(MPH) SE 5 SE 9 SE 9 SE 8
MIXING HGT(FT-AGL/MSL) 3290 4210
TRANSPORT WND (MPH) E 7 SE 10
VENT RATE (KT-FT) 19740 37890
DISPERSION 5 5
DSI 1 6 2 5
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ024-220800-
CAYEY MOUNTAIN RANGE-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY MCLDY MCLDY
PRECIP TYPE SHOWERS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 40 70 60 100
TEMP (24H TREND) 70 (-2) 85 (+2) 71 85
RH % (24H TREND) 99 (+5) 66 (0) 99 67
WIND 20FT/EARLY(MPH) LGT/VAR SE 9 SE 5 E 8
WIND 20FT/LATE(MPH) LGT/VAR SE 10 LGT/VAR SE 9
MIXING HGT(FT-AGL/MSL) 4060 4690
TRANSPORT WND (MPH) SE 12 SE 14
VENT RATE (KT-FT) 40600 56280
DISPERSION 5 5
DSI 1 6 1 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ025-220800-
VIEQUES-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY MCLDY MCLDY
PRECIP TYPE TSTMS TSTMS TSTMS TSTMS
CHANCE PRECIP (%) 60 40 60 60
TEMP (24H TREND) 78 (-1) 90 (+1) 77 90
RH % (24H TREND) 88 (+6) 59 (-3) 90 60
WIND 20FT/EARLY(MPH) SE 8 SE 11 SE 9 E 14
WIND 20FT/LATE(MPH) SE 9 SE 10 SE 8 SE 12
MIXING HGT(FT-AGL/MSL) 3320 3320
TRANSPORT WND (MPH) E 13 E 16
VENT RATE (KT-FT) 36520 46480
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ026-220800-
CULEBRA-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY MCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 50 30 50 60
TEMP (24H TREND) 79 (-2) 89 (+1) 78 89
RH % (24H TREND) 87 (+7) 62 (-3) 89 62
WIND 20FT/EARLY(MPH) SE 9 SE 11 SE 10 SE 14
WIND 20FT/LATE(MPH) SE 10 SE 10 SE 9 SE 12
MIXING HGT(FT-AGL/MSL) 3400 3280
TRANSPORT WND (MPH) SE 12 E 16
VENT RATE (KT-FT) 34000 45920
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
PRZ027-220800-
SOUTHWEST COASTAL PLAINS AND MONA ISLAND-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS TSTMS SHOWERS TSTMS
CHANCE PRECIP (%) 20 60 40 50
TEMP (24H TREND) 75 (-1) 92 (+2) 75 92
RH % (24H TREND) 95 (+8) 55 (-2) 93 54
WIND 20FT/EARLY(MPH) E 11 E 14 E 12 E 14
WIND 20FT/LATE(MPH) E 11 SE 16 E 13 SE 16
MIXING HGT(FT-AGL/MSL) 2190 3090
TRANSPORT WND (MPH) E 13 SE 14
VENT RATE (KT-FT) 24090 37080
DISPERSION 5 5
DSI 4 6 4 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ001-220800-
SAINT THOMAS AND SAINT JOHN-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE SHOWERS SHOWERS SHOWERS TSTMS
CHANCE PRECIP (%) 30 30 40 50
TEMP (24H TREND) 77 (-3) 88 (+1) 77 88
RH % (24H TREND) 88 (+7) 64 (-3) 90 65
WIND 20FT/EARLY(MPH) SE 9 SE 11 SE 11 E 17
WIND 20FT/LATE(MPH) SE 9 SE 10 SE 10 SE 14
MIXING HGT(FT-AGL/MSL) 3200 3320
TRANSPORT WND (MPH) SE 13 E 16
VENT RATE (KT-FT) 35200 46480
DISPERSION 5 5
DSI 6 6 6 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
VIZ002-220800-
ST CROIX-
330 PM AST WED OCT 21 2026
TONIGHT THU THU NIGHT FRI
CLOUD COVER PCLDY PCLDY PCLDY PCLDY
PRECIP TYPE TSTMS SHOWERS SHOWERS SHOWERS
CHANCE PRECIP (%) 50 40 30 40
TEMP (24H TREND) 77 (-2) 89 (+1) 77 89
RH % (24H TREND) 92 (+6) 65 (-3) 93 65
WIND 20FT/EARLY(MPH) SE 8 E 10 SE 10 E 14
WIND 20FT/LATE(MPH) E 9 SE 11 E 9 E 13
MIXING HGT(FT-AGL/MSL) 4250 3250
TRANSPORT WND (MPH) SE 13 E 17
VENT RATE (KT-FT) 46750 48750
DISPERSION 5 5
DSI 6 6 5 6
RH RECOVERY EXCELLENT EXCELLENT
REMARKS...NONE.
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